Johansson, 32, reportedly first caught the "Weekend Update" anchor's eye after she hosted the long-running sketch show for a fifth time on March 11, and the pair has been hooking up ever since.

"They're not in a relationship, but they have fun together," a source told E! of the two, who are both native New Yorkers. "They like each other, but it's not exclusive — at least not at this point. At this point, it's fun and casual."